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From: "K. Y. Srinivasan" <kys@microsoft.com>
To: gregkh@suse.de, linux-kernel@vger.kernel.org,
devel@linuxdriverproject.org, virtualization@lists.osdl.org
Cc: "K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Hank Janssen <hjanssen@microsoft.com>
Subject: [PATCH 10/22] Staging: hv: Simplify blkvsc_init_rw()
Date: Wed, 6 Apr 2011 16:05:10 -0700 [thread overview]
Message-ID: <1302131122-15530-10-git-send-email-kys@microsoft.com> (raw)
In-Reply-To: <1302131122-15530-1-git-send-email-kys@microsoft.com>
Simplyfify blkvsc_init_rw() by using a single scsi command independent of
the start sector.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
---
drivers/staging/hv/blkvsc_drv.c | 58 +++++++++------------------------------
1 files changed, 13 insertions(+), 45 deletions(-)
diff --git a/drivers/staging/hv/blkvsc_drv.c b/drivers/staging/hv/blkvsc_drv.c
index b2cd04a..5cf82f0 100644
--- a/drivers/staging/hv/blkvsc_drv.c
+++ b/drivers/staging/hv/blkvsc_drv.c
@@ -305,53 +305,21 @@ static void blkvsc_init_rw(struct blkvsc_request *blkvsc_req)
blkvsc_req->cmd_len = 16;
- if (blkvsc_req->sector_start > 0xffffffff) {
- if (rq_data_dir(blkvsc_req->req)) {
- blkvsc_req->write = 1;
- blkvsc_req->cmnd[0] = WRITE_16;
- } else {
- blkvsc_req->write = 0;
- blkvsc_req->cmnd[0] = READ_16;
- }
-
- blkvsc_req->cmnd[1] |=
- (blkvsc_req->req->cmd_flags & REQ_FUA) ? 0x8 : 0;
-
- *(unsigned long long *)&blkvsc_req->cmnd[2] =
- cpu_to_be64(blkvsc_req->sector_start);
- *(unsigned int *)&blkvsc_req->cmnd[10] =
- cpu_to_be32(blkvsc_req->sector_count);
- } else if ((blkvsc_req->sector_count > 0xff) ||
- (blkvsc_req->sector_start > 0x1fffff)) {
- if (rq_data_dir(blkvsc_req->req)) {
- blkvsc_req->write = 1;
- blkvsc_req->cmnd[0] = WRITE_10;
- } else {
- blkvsc_req->write = 0;
- blkvsc_req->cmnd[0] = READ_10;
- }
-
- blkvsc_req->cmnd[1] |=
- (blkvsc_req->req->cmd_flags & REQ_FUA) ? 0x8 : 0;
-
- *(unsigned int *)&blkvsc_req->cmnd[2] =
- cpu_to_be32(blkvsc_req->sector_start);
- *(unsigned short *)&blkvsc_req->cmnd[7] =
- cpu_to_be16(blkvsc_req->sector_count);
+ if (rq_data_dir(blkvsc_req->req)) {
+ blkvsc_req->write = 1;
+ blkvsc_req->cmnd[0] = WRITE_16;
} else {
- if (rq_data_dir(blkvsc_req->req)) {
- blkvsc_req->write = 1;
- blkvsc_req->cmnd[0] = WRITE_6;
- } else {
- blkvsc_req->write = 0;
- blkvsc_req->cmnd[0] = READ_6;
- }
-
- *(unsigned int *)&blkvsc_req->cmnd[1] =
- cpu_to_be32(blkvsc_req->sector_start) >> 8;
- blkvsc_req->cmnd[1] &= 0x1f;
- blkvsc_req->cmnd[4] = (unsigned char)blkvsc_req->sector_count;
+ blkvsc_req->write = 0;
+ blkvsc_req->cmnd[0] = READ_16;
}
+
+ blkvsc_req->cmnd[1] |=
+ (blkvsc_req->req->cmd_flags & REQ_FUA) ? 0x8 : 0;
+
+ *(unsigned long long *)&blkvsc_req->cmnd[2] =
+ cpu_to_be64(blkvsc_req->sector_start);
+ *(unsigned int *)&blkvsc_req->cmnd[10] =
+ cpu_to_be32(blkvsc_req->sector_count);
}
--
1.7.4.1
next prev parent reply other threads:[~2011-04-06 22:54 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-06 23:03 [RESEND][PATCH 00/22] Staging: hv: Cleanup storage drivers - Phase IV K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 01/22] Staging: hv: Get rid of blkvsc_check_events() K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 02/22] Staging: hv: Enable blkvsc_ioctl() K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 03/22] Staging: hv: Simplify the code for blkvsc_getgeo() K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 04/22] Staging: hv: Introduce a common function for issuing commands to the device K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 05/22] Staging: hv: Get rid of blkvsc_do_read_capacity() K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 06/22] Staging: hv: Get rid of blkvsc_do_read_capacity16() K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 07/22] Staging: hv: Get rid of the function blkvsc_do_flush() K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 08/22] Staging: hv: Get rid of the state media_not_present K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 09/22] Staging: hv: Get rid of the function blkvsc_revalidate_disk() K. Y. Srinivasan
2011-04-06 23:05 ` K. Y. Srinivasan [this message]
2011-04-06 23:05 ` [PATCH 11/22] Staging: hv: Get rid of some DPRINT_INFO() statements K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 12/22] Staging: hv: Get rid of some DPRINT_DBG() calls K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 13/22] Staging: hv: Cleanup blkvsc_remove() K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 14/22] Staging: hv: Cleanup storvsc_remove() K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 15/22] Staging: hv: Get rid of the code to manage removable media K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 16/22] Staging: hv: Get rid of some DPRINT_ERR() calls K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 17/22] Staging: hv: Get rid of an unnecessary check in blkvsc_probe() K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 18/22] Staging: hv: Cleanup blkvsc_open() K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 19/22] Staging: hv: Fix a jump label (Cleanup) in blkvsc_drv K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 20/22] Staging: hv: Fix a jump label (Remove) in blkvsc_drv.c K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 21/22] Staging: hv: Introduce a function to map channel properties onto block device info K. Y. Srinivasan
2011-04-06 23:05 ` [PATCH 22/22] Staging: hv: Get rid of IDE details from blkvsc_drv.c K. Y. Srinivasan
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