Date: Sun, 29 Mar 2020 23:01:36 +0000 (UTC) From: Vladimir Kondratyev <wulf@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r359429 - head/sys/dev/evdev Message-ID: <202003292301.02TN1aHG087422@repo.freebsd.org>
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Author: wulf Date: Sun Mar 29 23:01:36 2020 New Revision: 359429 URL: https://svnweb.freebsd.org/changeset/base/359429 Log: evdev: return error rather than zero-length data on blocked read() if blocked process has been woken up by evdev device destruction. MFC after: 2 weeks Modified: head/sys/dev/evdev/cdev.c Modified: head/sys/dev/evdev/cdev.c ============================================================================== --- head/sys/dev/evdev/cdev.c Sun Mar 29 23:00:33 2020 (r359428) +++ head/sys/dev/evdev/cdev.c Sun Mar 29 23:01:36 2020 (r359429) @@ -217,6 +217,8 @@ evdev_read(struct cdev *dev, struct uio *uio, int iofl client->ec_blocked = true; ret = mtx_sleep(client, &client->ec_buffer_mtx, PCATCH, "evread", 0); + if (ret == 0 && client->ec_revoked) + ret = ENODEV; } } }
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