mirror of
https://github.com/SCST-project/scst.git
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f401303211
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@143 d57e44dd-8a1f-0410-8b47-8ef2f437770f
110 lines
4.3 KiB
Diff
110 lines
4.3 KiB
Diff
diff -upr linux-2.6.21.1/drivers/scsi/scsi_lib.c linux-2.6.21.1/drivers/scsi/scsi_lib.c
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--- linux-2.6.21.1/drivers/scsi/scsi_lib.c 2007-04-28 01:49:26.000000000 +0400
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+++ linux-2.6.21.1/drivers/scsi/scsi_lib.c 2007-06-20 13:19:50.000000000 +0400
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@@ -366,7 +366,7 @@ free_bios:
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}
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/**
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- * scsi_execute_async - insert request
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+ * __scsi_execute_async - insert request
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* @sdev: scsi device
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* @cmd: scsi command
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* @cmd_len: length of scsi cdb
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@@ -377,11 +377,14 @@ free_bios:
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* @timeout: request timeout in seconds
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* @retries: number of times to retry request
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* @flags: or into request flags
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+ * @at_head: insert request at head or tail of queue
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**/
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-int scsi_execute_async(struct scsi_device *sdev, const unsigned char *cmd,
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+static inline int __scsi_execute_async(struct scsi_device *sdev,
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+ const unsigned char *cmd,
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int cmd_len, int data_direction, void *buffer, unsigned bufflen,
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int use_sg, int timeout, int retries, void *privdata,
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- void (*done)(void *, char *, int, int), gfp_t gfp)
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+ void (*done)(void *, char *, int, int), gfp_t gfp,
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+ int at_head)
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{
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struct request *req;
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struct scsi_io_context *sioc;
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@@ -418,7 +421,7 @@ int scsi_execute_async(struct scsi_devic
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sioc->data = privdata;
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sioc->done = done;
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- blk_execute_rq_nowait(req->q, NULL, req, 1, scsi_end_async);
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+ blk_execute_rq_nowait(req->q, NULL, req, at_head, scsi_end_async);
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return 0;
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free_req:
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@@ -427,8 +430,53 @@ free_sense:
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kmem_cache_free(scsi_io_context_cache, sioc);
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return DRIVER_ERROR << 24;
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}
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+
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+/**
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+ * scsi_execute_async - insert request
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+ * @sdev: scsi device
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+ * @cmd: scsi command
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+ * @cmd_len: length of scsi cdb
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+ * @data_direction: data direction
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+ * @buffer: data buffer (this can be a kernel buffer or scatterlist)
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+ * @bufflen: len of buffer
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+ * @use_sg: if buffer is a scatterlist this is the number of elements
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+ * @timeout: request timeout in seconds
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+ * @retries: number of times to retry request
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+ * @flags: or into request flags
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+ **/
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+int scsi_execute_async(struct scsi_device *sdev, const unsigned char *cmd,
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+ int cmd_len, int data_direction, void *buffer, unsigned bufflen,
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+ int use_sg, int timeout, int retries, void *privdata,
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+ void (*done)(void *, char *, int, int), gfp_t gfp)
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+{
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+ return __scsi_execute_async(sdev, cmd, cmd_len, data_direction, buffer,
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+ bufflen, use_sg, timeout, retries, privdata, done, gfp, 1);
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+}
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EXPORT_SYMBOL_GPL(scsi_execute_async);
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+/**
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+ * scsi_execute_async_fifo - insert request at tail, in FIFO order
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+ * @sdev: scsi device
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+ * @cmd: scsi command
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+ * @cmd_len: length of scsi cdb
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+ * @data_direction: data direction
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+ * @buffer: data buffer (this can be a kernel buffer or scatterlist)
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+ * @bufflen: len of buffer
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+ * @use_sg: if buffer is a scatterlist this is the number of elements
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+ * @timeout: request timeout in seconds
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+ * @retries: number of times to retry request
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+ * @flags: or into request flags
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+ **/
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+int scsi_execute_async_fifo(struct scsi_device *sdev, const unsigned char *cmd,
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+ int cmd_len, int data_direction, void *buffer, unsigned bufflen,
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+ int use_sg, int timeout, int retries, void *privdata,
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+ void (*done)(void *, char *, int, int), gfp_t gfp)
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+{
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+ return __scsi_execute_async(sdev, cmd, cmd_len, data_direction, buffer,
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+ bufflen, use_sg, timeout, retries, privdata, done, gfp, 0);
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+}
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+EXPORT_SYMBOL_GPL(scsi_execute_async_fifo);
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+
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/*
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* Function: scsi_init_cmd_errh()
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*
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diff -upr linux-2.6.21.1/include/scsi/scsi_device.h linux-2.6.21.1/include/scsi/scsi_device.h
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--- linux-2.6.21.1/include/scsi/scsi_device.h 2007-04-28 01:49:26.000000000 +0400
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+++ linux-2.6.21.1/include/scsi/scsi_device.h 2007-06-20 13:25:07.000000000 +0400
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@@ -298,6 +298,13 @@ extern int scsi_execute_async(struct scs
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int timeout, int retries, void *privdata,
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void (*done)(void *, char *, int, int),
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gfp_t gfp);
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+#define SCSI_EXEC_REQ_FIFO_DEFINED
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+extern int scsi_execute_async_fifo(struct scsi_device *sdev,
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+ const unsigned char *cmd, int cmd_len, int data_direction,
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+ void *buffer, unsigned bufflen, int use_sg,
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+ int timeout, int retries, void *privdata,
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+ void (*done)(void *, char *, int, int),
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+ gfp_t gfp);
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static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev)
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{
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