From: Damien Le Moal Date: Mon, 24 Apr 2017 07:51:12 +0000 (+0900) Subject: scsi: Improve scsi_get_sense_info_fld X-Git-Tag: v5.15~11381^2~11 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2908769c35fbd3de7b874b60b95ba81546e3c920;p=platform%2Fkernel%2Flinux-starfive.git scsi: Improve scsi_get_sense_info_fld Use get_unaligned_be32 and get_unaligned_be64 to obtain values from the sense buffer instead of open coding the operations. Also change the function return value to a bool and fix the function signature declaration to remove spaces triggering checkpatch warnings. No functional change is introduced by this patch. Signed-off-by: Damien Le Moal Reviewed-by: Bart Van Assche Reviewed-by: Christoph Hellwig Signed-off-by: Martin K. Petersen --- diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 53e3343..d70c67c 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -46,6 +46,8 @@ #include +#include + static void scsi_eh_done(struct scsi_cmnd *scmd); /* @@ -2361,44 +2363,34 @@ EXPORT_SYMBOL(scsi_command_normalize_sense); * field will be placed if found. * * Return value: - * 1 if information field found, 0 if not found. + * true if information field found, false if not found. */ -int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len, - u64 * info_out) +bool scsi_get_sense_info_fld(const u8 *sense_buffer, int sb_len, + u64 *info_out) { - int j; const u8 * ucp; - u64 ull; if (sb_len < 7) - return 0; + return false; switch (sense_buffer[0] & 0x7f) { case 0x70: case 0x71: if (sense_buffer[0] & 0x80) { - *info_out = (sense_buffer[3] << 24) + - (sense_buffer[4] << 16) + - (sense_buffer[5] << 8) + sense_buffer[6]; - return 1; - } else - return 0; + *info_out = get_unaligned_be32(&sense_buffer[3]); + return true; + } + return false; case 0x72: case 0x73: ucp = scsi_sense_desc_find(sense_buffer, sb_len, 0 /* info desc */); if (ucp && (0xa == ucp[1])) { - ull = 0; - for (j = 0; j < 8; ++j) { - if (j > 0) - ull <<= 8; - ull |= ucp[4 + j]; - } - *info_out = ull; - return 1; - } else - return 0; + *info_out = get_unaligned_be64(&ucp[4]); + return true; + } + return false; default: - return 0; + return false; } } EXPORT_SYMBOL(scsi_get_sense_info_fld); diff --git a/include/scsi/scsi_eh.h b/include/scsi/scsi_eh.h index a25b328..64d30d8 100644 --- a/include/scsi/scsi_eh.h +++ b/include/scsi/scsi_eh.h @@ -23,8 +23,8 @@ static inline bool scsi_sense_is_deferred(const struct scsi_sense_hdr *sshdr) return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1)); } -extern int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len, - u64 * info_out); +extern bool scsi_get_sense_info_fld(const u8 *sense_buffer, int sb_len, + u64 *info_out); extern int scsi_ioctl_reset(struct scsi_device *, int __user *);