* [PATCH] mmc: core: try to use an id from the devicetree
@ 2019-04-16 13:39 Lubomir Rintel
0 siblings, 0 replies; only message in thread
From: Lubomir Rintel @ 2019-04-16 13:39 UTC (permalink / raw)
To: Ulf Hansson; +Cc: linux-mmc, linux-kernel, Lubomir Rintel
If there's a mmc* alias in the device tree, take the device number from
it, so that we end up with a device name that matches the alias.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
---
drivers/mmc/core/host.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 3a4402a79904..9e2c31b9366e 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -411,7 +411,12 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
/* scanning will be enabled when we're ready */
host->rescan_disable = 1;
- err = ida_simple_get(&mmc_host_ida, 0, 0, GFP_KERNEL);
+ /* prefer an alias */
+ err = of_alias_get_id(dev->of_node, "mmc");
+ if (err < 0)
+ err = 0;
+
+ err = ida_simple_get(&mmc_host_ida, err, 0, GFP_KERNEL);
if (err < 0) {
kfree(host);
return NULL;
--
2.21.0
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