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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-04-09 21:00:42 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-04-09 21:00:42 +0200 |
| commit | fb41b4be00270f5b28784a31a458a4dcf4519b9e (patch) | |
| tree | 0b290e379051e4e1db71e63ed5dc1e943379fb1b /include | |
| parent | Merge tag 'md/4.6-rc2-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/s... (diff) | |
| parent | Merge branch 'fixes-base' into fixes (diff) | |
| download | linux-fb41b4be00270f5b28784a31a458a4dcf4519b9e.tar.xz linux-fb41b4be00270f5b28784a31a458a4dcf4519b9e.zip | |
Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"This is a set of eight fixes.
Two are trivial gcc-6 updates (brace additions and unused variable
removal). There's a couple of cxlflash regressions, a correction for
sd being overly chatty on revalidation (causing excess log increases).
A VPD issue which could crash USB devices because they seem very
intolerant to VPD inquiries, an ALUA deadlock fix and a mpt3sas buffer
overrun fix"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: Do not attach VPD to devices that don't support it
sd: Fix excessive capacity printing on devices with blocks bigger than 512 bytes
scsi_dh_alua: Fix a recently introduced deadlock
scsi: Declare local symbols static
cxlflash: Move to exponential back-off when cmd_room is not available
cxlflash: Fix regression issue with re-ordering patch
mpt3sas: Don't overreach ioc->reply_post[] during initialization
aacraid: add missing curly braces
Diffstat (limited to 'include')
| -rw-r--r-- | include/scsi/scsi_device.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index c067019ed12a..74d79bde7075 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -516,6 +516,31 @@ static inline int scsi_device_tpgs(struct scsi_device *sdev) return sdev->inquiry ? (sdev->inquiry[5] >> 4) & 0x3 : 0; } +/** + * scsi_device_supports_vpd - test if a device supports VPD pages + * @sdev: the &struct scsi_device to test + * + * If the 'try_vpd_pages' flag is set it takes precedence. + * Otherwise we will assume VPD pages are supported if the + * SCSI level is at least SPC-3 and 'skip_vpd_pages' is not set. + */ +static inline int scsi_device_supports_vpd(struct scsi_device *sdev) +{ + /* Attempt VPD inquiry if the device blacklist explicitly calls + * for it. + */ + if (sdev->try_vpd_pages) + return 1; + /* + * Although VPD inquiries can go to SCSI-2 type devices, + * some USB ones crash on receiving them, and the pages + * we currently ask for are for SPC-3 and beyond + */ + if (sdev->scsi_level > SCSI_SPC_2 && !sdev->skip_vpd_pages) + return 1; + return 0; +} + #define MODULE_ALIAS_SCSI_DEVICE(type) \ MODULE_ALIAS("scsi:t-" __stringify(type) "*") #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x" |