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| author | Alan Stern <stern@rowland.harvard.edu> | 2005-10-24 04:40:22 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2005-10-29 01:47:50 +0200 |
| commit | bbafa4668f37f5093a3ae2a8b0cbe327e24e12da (patch) | |
| tree | e679db87309810e8da8092ffcb3df5a9dd7323e0 /drivers/usb/storage/usb.c | |
| parent | [PATCH] PATCH: usb-storage: move GetMaxLUN later in time (diff) | |
| download | linux-bbafa4668f37f5093a3ae2a8b0cbe327e24e12da.tar.xz linux-bbafa4668f37f5093a3ae2a8b0cbe327e24e12da.zip | |
[PATCH] PATCH: usb-storage: allocate separate sense buffer
This patch is from Alan Stern (as560). It has been rediffed against a
current tree.
This patch allocates a separate buffer for usb-storage to use when
auto-sensing. Up to now we have been using the sense buffer embedded in a
scsi_cmnd struct, which is dangerous on hosts that (a) don't do
cache-coherent DMA or (b) have DMA alignment restrictions.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/storage/usb.c')
| -rw-r--r-- | drivers/usb/storage/usb.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c index 92ee079d9172..eb901817b7d2 100644 --- a/drivers/usb/storage/usb.c +++ b/drivers/usb/storage/usb.c @@ -467,6 +467,12 @@ static int associate_dev(struct us_data *us, struct usb_interface *intf) US_DEBUGP("I/O buffer allocation failed\n"); return -ENOMEM; } + + us->sensebuf = kmalloc(US_SENSE_SIZE, GFP_KERNEL); + if (!us->sensebuf) { + US_DEBUGP("Sense buffer allocation failed\n"); + return -ENOMEM; + } return 0; } @@ -800,6 +806,8 @@ static void dissociate_dev(struct us_data *us) { US_DEBUGP("-- %s\n", __FUNCTION__); + kfree(us->sensebuf); + /* Free the device-related DMA-mapped buffers */ if (us->cr) usb_buffer_free(us->pusb_dev, sizeof(*us->cr), us->cr, |