udev: Only scan the requested USB device

pcercuei · pcercuei · commit d397c403d684 · 2022-02-17T16:36:21.000+01:00
Instead of scanning all USB devices everytime a new device is plugged,
which might disrupt the functionality of the unrelated devices being
scanned, only scan for the USB device we are interested in, since we
know its VID/PID.

Signed-off-by: Paul Cercueil &lt;paul@crapouillou.net&gt;
diff --git a/libiio.rules.cmakein b/libiio.rules.cmakein
@@ -1 +1 @@
-SUBSYSTEM=="usb", PROGRAM=="/bin/sh -c '@CMAKE_INSTALL_FULL_BINDIR@/iio_info -S usb | grep %s{idVendor}:%s{idProduct}'", RESULT!="", MODE="666"
+SUBSYSTEM=="usb", PROGRAM=="/bin/sh -c '@CMAKE_INSTALL_FULL_BINDIR@/iio_info -S usb=%s{idVendor}:%s{idProduct} | grep %s{idVendor}:%s{idProduct}'", RESULT!="", MODE="666"

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-SUBSYSTEM=="usb", PROGRAM=="/bin/sh -c '@CMAKE_INSTALL_FULL_BINDIR@/iio_info -S usb \| grep %s{idVendor}:%s{idProduct}'", RESULT!="", MODE="666"`
	`1`	`+SUBSYSTEM=="usb", PROGRAM=="/bin/sh -c '@CMAKE_INSTALL_FULL_BINDIR@/iio_info -S usb=%s{idVendor}:%s{idProduct} \| grep %s{idVendor}:%s{idProduct}'", RESULT!="", MODE="666"`