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Bottomley" , "Martin K. Petersen" , Stanley Chu , Bean Huo , Tomas Winkler , Venkat Gopalakrishnan , linux-kernel@vger.kernel.org (open list) Subject: [PATCH v4 4/7] scsi: ufs: Fix register dump caused sleep in atomic context Date: Tue, 12 Nov 2019 22:45:48 -0800 Message-Id: <1573627552-12615-5-git-send-email-cang@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1573627552-12615-1-git-send-email-cang@codeaurora.org> References: <1573627552-12615-1-git-send-email-cang@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org ufshcd_print_host_regs() can be called by interrupt handler, but it may sleep due to ufshcd_dump_regs() allocates the dump buffer memory with flag GFP_KERNEL. Fix it by changing GFP_KERNEL to GFP_ATMOIC. Signed-off-by: Can Guo Reviewed-by: Bean Huo --- drivers/scsi/ufs/ufshcd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index f12f5a7..671ea2a 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -117,7 +117,7 @@ int ufshcd_dump_regs(struct ufs_hba *hba, size_t offset, size_t len, if (offset % 4 != 0 || len % 4 != 0) /* keep readl happy */ return -EINVAL; - regs = kzalloc(len, GFP_KERNEL); + regs = kzalloc(len, GFP_ATOMIC); if (!regs) return -ENOMEM; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project