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MdeModulePkg/UsbMassStorageDxe: Enhance Request Sense Handling 

https://bugzilla.tianocore.org/show_bug.cgi?id=782

Update the Request Sense check for the Request Sense Key of
USB_BOOT_SENSE_UNIT_ATTENTION.  For this Sense Key, the
Additional Sense Key to EFI_STATUS mappings are:

USB_BOOT_ASC_MEDIA_CHANGE -> EFI_MEDIA_CHANGE
USB_BOOT_ASC_NOT_READY    -> EFI_NOT_READY
USB_BOOT_ASC_NO_MEDIA     -> EFI_NOT_READY
All others                -> EFI_DEVICE_ERROR

A USB flash drive is returning Request Sense Key of
USB_BOOT_SENSE_UNIT_ATTENTION and an Additional Sense Key of
USB_BOOT_ASC_NO_MEDIA for a few seconds before returning an
Additional Sense Key of USB_BOOT_ASC_MEDIA_CHANGE.

The current logic treats this initial Request Sense info as an
error and reties the command 5 times before failing completely.

With this change the USB Flash Drive works correctly.

Cc: Star Zeng <star.zeng@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
This commit is contained in:
Michael D Kinney 2017-11-14 15:56:30 -08:00
parent c09d957130
commit d8030c2ae0
1 changed files with 4 additions and 0 deletions
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4
MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassBoot.c
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@ -120,6 +120,10 @@ UsbBootRequestSense (
Status = EFI_MEDIA_CHANGED;
Media->ReadOnly = FALSE;
Media->MediaId++;
} else if (SenseData.Asc == USB_BOOT_ASC_NOT_READY) {
Status = EFI_NOT_READY;
} else if (SenseData.Asc == USB_BOOT_ASC_NO_MEDIA) {
Status = EFI_NOT_READY;
}
break;