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Commit 679c0cd2 authored by Stefan Richter's avatar Stefan Richter Committed by Linus Torvalds
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[PATCH] sbp2: add ability to override hardwired blacklist 



In case the blacklist with workarounds for device bugs yields a false
positive, the module load parameter can now also be used as an override
instead of an addition to the blacklist.

Signed-off-by: default avatarStefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent e9a1c52c

drivers/ieee1394/sbp2.c

+18 −11
Original line number Diff line number Diff line
@@ -156,6 +156,11 @@ MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)" 
 *   Tell sd_mod to correct the last sector number reported by read_capacity.

 *   Avoids access beyond actual disk limits on devices with an off-by-one bug.

 *   Don't use this with devices which don't have this bug.

 *

 * - override internal blacklist

 *   Instead of adding to the built-in blacklist, use only the workarounds

 *   specified in the module load parameter.

 *   Useful if a blacklist entry interfered with a non-broken device.

 */

static int sbp2_default_workarounds;

module_param_named(workarounds, sbp2_default_workarounds, int, 0644);
@@ -164,6 +169,7 @@ MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" 
	", 36 byte inquiry = "    __stringify(SBP2_WORKAROUND_INQUIRY_36)

	", skip mode page 8 = "   __stringify(SBP2_WORKAROUND_MODE_SENSE_8)

	", fix capacity = "       __stringify(SBP2_WORKAROUND_FIX_CAPACITY)

	", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)

	", or a combination)");



/* legacy parameter */
@@ -1587,6 +1593,7 @@ static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id, 
		workarounds |= SBP2_WORKAROUND_INQUIRY_36;

	}



	if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))

		for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {

			if (sbp2_workarounds_table[i].firmware_revision &&

			    sbp2_workarounds_table[i].firmware_revision !=

drivers/ieee1394/sbp2.h

+1 −0
Original line number Diff line number Diff line
@@ -239,6 +239,7 @@ struct sbp2_status_block { 
#define SBP2_WORKAROUND_INQUIRY_36	0x2

#define SBP2_WORKAROUND_MODE_SENSE_8	0x4

#define SBP2_WORKAROUND_FIX_CAPACITY	0x8

#define SBP2_WORKAROUND_OVERRIDE	0x100



/* This is the two dma types we use for cmd_dma below */

enum cmd_dma_types {