linux-kernel - RE: [EXT] [PATCH v2 4/7] scsi: ufs: Fix register dump caused sleep in atomic context

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Message-ID: <BN7PR08MB5684D1EF6FD8176E09151716DB7F0@BN7PR08MB5684.namprd08.prod.outlook.com>
Date:   Mon, 4 Nov 2019 13:48:16 +0000
From:   "Bean Huo (beanhuo)" <beanhuo@...ron.com>
To:     Can Guo <cang@...eaurora.org>,
        "asutoshd@...eaurora.org" <asutoshd@...eaurora.org>,
        "nguyenb@...eaurora.org" <nguyenb@...eaurora.org>,
        "rnayak@...eaurora.org" <rnayak@...eaurora.org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "kernel-team@...roid.com" <kernel-team@...roid.com>,
        "saravanak@...gle.com" <saravanak@...gle.com>,
        "salyzyn@...gle.com" <salyzyn@...gle.com>
CC:     Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        Pedro Sousa <pedrom.sousa@...opsys.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Stanley Chu <stanley.chu@...iatek.com>,
        Tomas Winkler <tomas.winkler@...el.com>,
        Venkat Gopalakrishnan <venkatg@...eaurora.org>,
        Subhash Jadavani <subhashj@...eaurora.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: RE: [EXT] [PATCH v2 4/7] scsi: ufs: Fix register dump caused sleep in
 atomic context

> 
> 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 <cang@...eaurora.org>
Reviewed-by: Bean Huo <beanhuo@...ron.com>