From 97651ea687d3b6a214c32b49f79523db709fba18 Mon Sep 17 00:00:00 2001 From: David Milburn Date: Wed, 12 Sep 2012 14:06:12 -0500 Subject: [PATCH] mtip32xx: fix user_buffer check in exec_drive_command Current user_buffer check is incorrect and causes hdparm to fail # hdparm -I /dev/rssda HDIO_DRIVE_CMD(identify) failed: Input/output error /dev/rssda: Patching linux-3.6-rc5 hdparm works as expected # hdparm -I /dev/rssda /dev/rssda: ATA device, with non-removable media Model Number: DELL_P320h-MTFDGAL350SAH Serial Number: 00000000121302025F01 Firmware Revision: B1442808 Reported-by: Tomas Henzl Signed-off-by: David Milburn Signed-off-by: Jens Axboe --- drivers/block/mtip32xx/mtip32xx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c index e6519e2c9934..f946d31d6917 100644 --- a/drivers/block/mtip32xx/mtip32xx.c +++ b/drivers/block/mtip32xx/mtip32xx.c @@ -1904,7 +1904,7 @@ static int exec_drive_command(struct mtip_port *port, u8 *command, int rv = 0, xfer_sz = command[3]; if (xfer_sz) { - if (user_buffer) + if (!user_buffer) return -EFAULT; buf = dmam_alloc_coherent(&port->dd->pdev->dev,