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Error handling in UFS driver is broken and resets the host controller for fatal errors without re-initialization. Correct the fatal error handling sequence according to UFS Host Controller Interface (HCI) v1.1 specification. o Processed requests which are completed w/wo error are reported to SCSI layer and any pending commands that are not started are aborted in the controller and re-queued into scsi mid-layer queue. o Upon determining fatal error condition the host controller may hang forever until a reset is applied. Block SCSI layer for sending new requests and apply reset in a separate error handling work. o SCSI is informed about the expected Unit-Attention exception from the device for the immediate command after a reset so that the SCSI layer take necessary steps to establish communication with the device. Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org> Reviewed-by: Yaniv Gardi <ygardi@codeaurora.org> Tested-by: Dolev Raviv <draviv@codeaurora.org> Acked-by: Vinayak Holikatti <vinholikatti@gmail.com> Signed-off-by: Christoph Hellwig <hch@lst.de> |
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| .. | ||
| Kconfig | ||
| Makefile | ||
| ufs.h | ||
| ufshcd-pci.c | ||
| ufshcd-pltfrm.c | ||
| ufshcd.c | ||
| ufshcd.h | ||
| ufshci.h | ||
| unipro.h | ||