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From 84e81636b29cca6dc1a5423e76ac2ab2c636eb86 Mon Sep 17 00:00:00 2001
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From: Peter Hutterer <peter.hutterer@who-t.net>
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Date: Tue, 18 Jul 2017 08:41:37 +1000
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Subject: [PATCH] Remove the device's fd from the select() set when we get
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ENODEV
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If the device is unplugged, the fd triggers in select/poll/... but comes back
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with ENODEV. This triggers a lot of error messages in the log until finally
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the udev code catches up with us and the device is removed properly.
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Catch that case by removing the fd from the select() set so we don't get
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triggered to call read_input on it anymore.
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https://sourceforge.net/p/linuxwacom/bugs/337/
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Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
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Tested-by: crocket <crockabiscuit@gmail.com>
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Reviewed-by: Ping Cheng <ping.cheng@wacom.com>
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(cherry picked from commit 912611608b3ba892a7c26d1be81209f4e5b009d5)
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---
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src/xf86Wacom.c | 12 +++++++++---
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src/xf86Wacom.h | 2 +-
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2 files changed, 10 insertions(+), 4 deletions(-)
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diff --git a/src/xf86Wacom.c b/src/xf86Wacom.c
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index 90ce793..896a8c1 100644
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--- a/src/xf86Wacom.c
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+++ b/src/xf86Wacom.c
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@@ -632,7 +632,8 @@ static void wcmDevReadInput(InputInfoPtr pInfo)
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if (!wcmReady(pInfo)) break;
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/* dispatch */
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- wcmReadPacket(pInfo);
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+ if (!wcmReadPacket(pInfo))
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+ break;
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}
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#ifdef DEBUG
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@@ -649,7 +650,7 @@ static void wcmDevReadInput(InputInfoPtr pInfo)
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#endif
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}
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-void wcmReadPacket(InputInfoPtr pInfo)
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+Bool wcmReadPacket(InputInfoPtr pInfo)
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{
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WacomDevicePtr priv = (WacomDevicePtr)pInfo->private;
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WacomCommonPtr common = priv->common;
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@@ -672,7 +673,10 @@ void wcmReadPacket(InputInfoPtr pInfo)
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if (errno != EAGAIN && errno != EINTR)
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LogMessageVerbSigSafe(X_ERROR, 0,
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"%s: Error reading wacom device : %s\n", pInfo->name, strerror(errno));
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- return;
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+ if (errno == ENODEV)
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+ xf86RemoveEnabledDevice(pInfo);
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+
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+ return FALSE;
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}
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/* account for new data */
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@@ -704,6 +708,8 @@ void wcmReadPacket(InputInfoPtr pInfo)
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}
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common->bufpos = len;
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+
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+ return TRUE;
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}
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int wcmDevChangeControl(InputInfoPtr pInfo, xDeviceCtl * control)
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diff --git a/src/xf86Wacom.h b/src/xf86Wacom.h
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index afb4e9e..ccc2d56 100644
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--- a/src/xf86Wacom.h
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+++ b/src/xf86Wacom.h
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@@ -120,7 +120,7 @@ char *wcmEventAutoDevProbe (InputInfoPtr pInfo);
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int wcmInitTablet(InputInfoPtr pInfo, const char* id, float version);
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/* standard packet handler */
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-void wcmReadPacket(InputInfoPtr pInfo);
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+Bool wcmReadPacket(InputInfoPtr pInfo);
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/* handles suppression, filtering, and dispatch. */
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void wcmEvent(WacomCommonPtr common, unsigned int channel, const WacomDeviceState* ds);
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--
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2.13.6
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