From: "Tokunori Ikegami" <ikegami.t@gmail.com> To: "'Liu Jian'" <liujian56@huawei.com>, <dwmw2@infradead.org>, <computersforpeace@gmail.com>, <bbrezillon@kernel.org>, <marek.vasut@gmail.com>, <richard@nod.at>, <joakim.tjernlund@infinera.com>, <ikegami@allied-telesis.co.jp>, <keescook@chromium.org>, <vigneshr@ti.com> Cc: <linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org> Subject: RE: [PATCH v3] cfi: fix deadloop in cfi_cmdset_0002.c do_write_buffer Date: Thu, 28 Feb 2019 23:25:54 +0900 [thread overview] Message-ID: <016001d4cf71$865e7b60$931b7220$@gmail.com> (raw) In-Reply-To: <1551189648-58073-1-git-send-email-liujian56@huawei.com> > -----Original Message----- > From: linux-mtd [mailto:linux-mtd-bounces@lists.infradead.org] On Behalf > Of Liu Jian > Sent: Tuesday, February 26, 2019 11:01 PM > To: dwmw2@infradead.org; computersforpeace@gmail.com; > bbrezillon@kernel.org; marek.vasut@gmail.com; richard@nod.at; > joakim.tjernlund@infinera.com; ikegami@allied-telesis.co.jp; > keescook@chromium.org; vigneshr@ti.com > Cc: linux-mtd@lists.infradead.org; liujian56@huawei.com; > linux-kernel@vger.kernel.org > Subject: [PATCH v3] cfi: fix deadloop in cfi_cmdset_0002.c do_write_buffer > > In function do_write_buffer(), in the for loop, there is a case > chip_ready() returns 1 while chip_good() returns 0, so it never > break the loop. > To fix this, chip_good() is enough and it should timeout if it stay > bad for a while. > > Fixes: dfeae1073583("mtd: cfi_cmdset_0002: Change write buffer to check > correct value") > Signed-off-by: Yi Huaijie <yihuaijie@huawei.com> > Signed-off-by: Liu Jian <liujian56@huawei.com> > Reviewed-by: Tokunori Ikegami <ikegami_to@yahoo.co.jp> > --- > v2->v3: > Follow Vignesh's advice: > add one more check for check_good() even when time_after() returns true. > > drivers/mtd/chips/cfi_cmdset_0002.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c > b/drivers/mtd/chips/cfi_cmdset_0002.c > index 72428b6..3da2376 100644 > --- a/drivers/mtd/chips/cfi_cmdset_0002.c > +++ b/drivers/mtd/chips/cfi_cmdset_0002.c > @@ -1876,7 +1876,7 @@ static int __xipram do_write_buffer(struct map_info > *map, struct flchip *chip, > continue; > } > > - if (time_after(jiffies, timeo) && !chip_ready(map, adr)) > + if (time_after(jiffies, timeo) && !chip_good(map, adr, > datum)) Just another idea to understand easily. unsigned long now = jiffies; if (chip_good(map, adr, datum)) { xip_enable(map, chip, adr); goto op_done; } if (time_after(now, timeo) { break; } Regards, Ikegami > break; > > if (chip_good(map, adr, datum)) { > -- > 2.7.4 > > > ______________________________________________________ > Linux MTD discussion mailing list > http://lists.infradead.org/mailman/listinfo/linux-mtd/
WARNING: multiple messages have this Message-ID (diff)
From: "Tokunori Ikegami" <ikegami.t@gmail.com> To: "'Liu Jian'" <liujian56@huawei.com>, <dwmw2@infradead.org>, <computersforpeace@gmail.com>, <bbrezillon@kernel.org>, <marek.vasut@gmail.com>, <richard@nod.at>, <joakim.tjernlund@infinera.com>, <ikegami@allied-telesis.co.jp>, <keescook@chromium.org>, <vigneshr@ti.com> Cc: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org Subject: RE: [PATCH v3] cfi: fix deadloop in cfi_cmdset_0002.c do_write_buffer Date: Thu, 28 Feb 2019 23:25:54 +0900 [thread overview] Message-ID: <016001d4cf71$865e7b60$931b7220$@gmail.com> (raw) In-Reply-To: <1551189648-58073-1-git-send-email-liujian56@huawei.com> > -----Original Message----- > From: linux-mtd [mailto:linux-mtd-bounces@lists.infradead.org] On Behalf > Of Liu Jian > Sent: Tuesday, February 26, 2019 11:01 PM > To: dwmw2@infradead.org; computersforpeace@gmail.com; > bbrezillon@kernel.org; marek.vasut@gmail.com; richard@nod.at; > joakim.tjernlund@infinera.com; ikegami@allied-telesis.co.jp; > keescook@chromium.org; vigneshr@ti.com > Cc: linux-mtd@lists.infradead.org; liujian56@huawei.com; > linux-kernel@vger.kernel.org > Subject: [PATCH v3] cfi: fix deadloop in cfi_cmdset_0002.c do_write_buffer > > In function do_write_buffer(), in the for loop, there is a case > chip_ready() returns 1 while chip_good() returns 0, so it never > break the loop. > To fix this, chip_good() is enough and it should timeout if it stay > bad for a while. > > Fixes: dfeae1073583("mtd: cfi_cmdset_0002: Change write buffer to check > correct value") > Signed-off-by: Yi Huaijie <yihuaijie@huawei.com> > Signed-off-by: Liu Jian <liujian56@huawei.com> > Reviewed-by: Tokunori Ikegami <ikegami_to@yahoo.co.jp> > --- > v2->v3: > Follow Vignesh's advice: > add one more check for check_good() even when time_after() returns true. > > drivers/mtd/chips/cfi_cmdset_0002.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c > b/drivers/mtd/chips/cfi_cmdset_0002.c > index 72428b6..3da2376 100644 > --- a/drivers/mtd/chips/cfi_cmdset_0002.c > +++ b/drivers/mtd/chips/cfi_cmdset_0002.c > @@ -1876,7 +1876,7 @@ static int __xipram do_write_buffer(struct map_info > *map, struct flchip *chip, > continue; > } > > - if (time_after(jiffies, timeo) && !chip_ready(map, adr)) > + if (time_after(jiffies, timeo) && !chip_good(map, adr, > datum)) Just another idea to understand easily. unsigned long now = jiffies; if (chip_good(map, adr, datum)) { xip_enable(map, chip, adr); goto op_done; } if (time_after(now, timeo) { break; } Regards, Ikegami > break; > > if (chip_good(map, adr, datum)) { > -- > 2.7.4 > > > ______________________________________________________ > Linux MTD discussion mailing list > http://lists.infradead.org/mailman/listinfo/linux-mtd/ ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/
next prev parent reply other threads:[~2019-02-28 14:26 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-02-26 14:00 [PATCH v3] cfi: fix deadloop in cfi_cmdset_0002.c do_write_buffer Liu Jian 2019-02-26 14:00 ` Liu Jian 2019-02-28 14:25 ` Tokunori Ikegami [this message] 2019-02-28 14:25 ` Tokunori Ikegami 2019-02-28 15:12 ` liujian (CE) 2019-02-28 15:12 ` liujian (CE) 2019-02-28 15:42 ` Boris Brezillon 2019-02-28 15:42 ` Boris Brezillon 2019-03-01 14:51 ` Tokunori Ikegami 2019-03-01 16:07 ` Boris Brezillon 2019-03-01 16:07 ` Boris Brezillon 2019-03-01 16:54 ` Tokunori Ikegami 2019-03-01 16:54 ` Tokunori Ikegami 2019-03-01 16:47 ` Vignesh Raghavendra 2019-03-01 16:47 ` Vignesh Raghavendra 2019-03-01 16:59 ` Tokunori Ikegami 2019-03-01 16:59 ` Tokunori Ikegami 2019-03-01 17:43 ` Boris Brezillon 2019-03-01 17:43 ` Boris Brezillon 2019-03-01 17:55 ` Tokunori Ikegami 2019-03-02 8:57 ` Vignesh Raghavendra 2019-03-02 8:57 ` Vignesh Raghavendra 2019-03-01 19:56 ` Boris Brezillon 2019-03-01 19:56 ` Boris Brezillon
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to='016001d4cf71$865e7b60$931b7220$@gmail.com' \ --to=ikegami.t@gmail.com \ --cc=bbrezillon@kernel.org \ --cc=computersforpeace@gmail.com \ --cc=dwmw2@infradead.org \ --cc=ikegami@allied-telesis.co.jp \ --cc=joakim.tjernlund@infinera.com \ --cc=keescook@chromium.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-mtd@lists.infradead.org \ --cc=liujian56@huawei.com \ --cc=marek.vasut@gmail.com \ --cc=richard@nod.at \ --cc=vigneshr@ti.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.