Messages in this thread Patch in this message | | | From | Douglas Anderson <> | Subject | [PATCH v2 3/4] mmc: use SD/MMC host ID for block device name ID | Date | Fri, 29 Apr 2016 10:32:18 -0700 |
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From: Stefan Agner <stefan@agner.ch>
By using the SD/MMC host device ID as a starting point for block device numbering, one can reliably predict the first block device name (at least for the first controller). This is especially useful for SoCs with multiple SD/MMC host controller, where the controller with index 0 is connected to a eMMC device.
Usually the first controller gets the first block device name ID, however this is not guaranteed. Also if the first controller is aliased as second controller and visa-versa (using device tree aliases), the block device name ID assignation is not ordered by the SD/MMC host device ID (since mmc_rescan is called in order of the memory mapped pheripherial addresses).
Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Douglas Anderson <dianders@chromium.org> --- Changes in v2: - Rebased atop mmc-next
drivers/mmc/card/block.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 9ce679255775..360700f3e0ea 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -2197,7 +2197,7 @@ again: return ERR_PTR(-ENOMEM); spin_lock(&mmc_blk_lock); - ret = ida_get_new(&mmc_blk_ida, &devidx); + ret = ida_get_new_above(&mmc_blk_ida, card->host->index, &devidx); spin_unlock(&mmc_blk_lock); if (ret == -EAGAIN) -- 2.8.0.rc3.226.g39d4020
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