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| author | Ioana Ciornei <ioana.ciornei@nxp.com> | 2018-12-04 14:20:29 +0300 |
|---|---|---|
| committer | Li Yang <leoyang.li@nxp.com> | 2019-01-08 23:15:37 +0300 |
| commit | 991e873223e9bcfaf10a0074eec1507c1ddfb6ab (patch) | |
| tree | ee93eb8fabe6540522c803ecf925afded1246d64 /include/soc | |
| parent | e181a569d8e52d5a5c91cf2ddc3ebcfb81163887 (diff) | |
| download | linux-991e873223e9bcfaf10a0074eec1507c1ddfb6ab.tar.xz | |
soc: fsl: dpio: use a cpumask to identify which cpus are unused
The current implementation of the dpio driver uses a static next_cpu
variable to keep track of the index of the next cpu available. This
approach does not handle well unbinding and binding dpio devices in a
random order. For example, unbinding a dpio and then binding it again
with the driver, will generate the below error:
$ echo dpio.5 > /sys/bus/fsl-mc/drivers/fsl_mc_dpio/unbind
$ echo dpio.5 > /sys/bus/fsl-mc/drivers/fsl_mc_dpio/bind
[ 103.946380] fsl_mc_dpio dpio.5: probe failed. Number of DPIOs exceeds
NR_CPUS.
[ 103.955157] fsl_mc_dpio dpio.5: fsl_mc_driver_probe failed: -34
-bash: echo: write error: No such device
Fix this error by keeping a global cpumask of unused cpus that will be
updated at every dpaa2_dpio_[probe,remove].
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>
Diffstat (limited to 'include/soc')
| -rw-r--r-- | include/soc/fsl/dpaa2-io.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/soc/fsl/dpaa2-io.h b/include/soc/fsl/dpaa2-io.h index 3fbd71c27ba3..243119c53cdf 100644 --- a/include/soc/fsl/dpaa2-io.h +++ b/include/soc/fsl/dpaa2-io.h @@ -90,6 +90,8 @@ struct dpaa2_io_notification_ctx { void *dpio_private; }; +int dpaa2_io_get_cpu(struct dpaa2_io *d); + int dpaa2_io_service_register(struct dpaa2_io *service, struct dpaa2_io_notification_ctx *ctx); void dpaa2_io_service_deregister(struct dpaa2_io *service, |