From: Stanley Chu Date: Sat, 4 Jan 2020 14:26:06 +0000 (+0800) Subject: scsi: ufs: fix empty check of error history X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=645728a6448fece4817acdb7efba7c19e5c3e311;p=linux.git scsi: ufs: fix empty check of error history Currently checking if an error history element is empty or not is by its "value". In most cases, value is error code. However this checking is not correct because some errors or events do not specify any values in error history so values remain as 0, and this will lead to incorrect empty checking. Fix it by checking "timestamp" instead of "value" because timestamp will be always assigned for all history elements Cc: Alim Akhtar Cc: Asutosh Das Cc: Avri Altman Cc: Bart Van Assche Cc: Bean Huo Cc: Can Guo Cc: Matthias Brugger Link: https://lore.kernel.org/r/1578147968-30938-2-git-send-email-stanley.chu@mediatek.com Reviewed-by: Bean Huo Signed-off-by: Stanley Chu Signed-off-by: Martin K. Petersen --- diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 1b97f2dc0b636..bae43da00bb66 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -385,7 +385,7 @@ static void ufshcd_print_err_hist(struct ufs_hba *hba, for (i = 0; i < UFS_ERR_REG_HIST_LENGTH; i++) { int p = (i + err_hist->pos) % UFS_ERR_REG_HIST_LENGTH; - if (err_hist->reg[p] == 0) + if (err_hist->tstamp[p] == 0) continue; dev_err(hba->dev, "%s[%d] = 0x%x at %lld us\n", err_name, p, err_hist->reg[p], ktime_to_us(err_hist->tstamp[p]));