[Bug 257389] MMCCAM : aliases are not correctly created for eMMC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=257389

            Bug ID: 257389
           Summary: MMCCAM : aliases are not correctly created for eMMC
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: manu@freebsd.org

In a MMCCAM enabled kernel we make some "mmcsd" aliases so we are backward
compatible with non-MMCCAM kernel.
This seems to fail for eMMC.

Logs :

(pass0:sdhci_slot0:0:0:0): XPT info: CLK 399193, ...
(sdda0:sdhci_slot0:0:0:0): Periph created
(sdda0:sdhci_slot0:0:0:0): Capacity: 62537072640, sectors: 122142720
(sdda0:sdhci_slot0:0:0:0): Set SD freq to 52 MHz (min out of host f=198 MHz and
card f=52 MHz)
sdhci_fdt0-slot0: Divider 2 for freq 49500000 (base 198000000)
(sdda0:sdhci_slot0:0:0:0): Set bus width to 8-bit (min of host 8-bit and card
8-bit)
(sdda0:sdhci_slot0:0:0:0): Partition type 'default', size 62537072640 
(sdda0:sdhci_slot0:0:0:0): Partition type 'boot0', size 4194304 
GEOM: new disk sdda0
(sdda0:sdhci_slot0:0:0:0): Partition type 'boot1', size 4194304 
(sdda0:sdhci_slot0:0:0:0): Partition type 'RPMB', size 4194304 
(sdda0:sdhci_slot0:0:0:0): Don't know what to do with RPMB partitions yet
sdda0 at sdhci_slot0 bus 0 scbus0 target 0 lun 0
sdda0: Relative addr: 00000002
Card features: <MMC Memory High-Capacity>
Card memory OCR: 40ff8080
sdda0: Serial Number 1A61E8CB
(sdda0:sdhci_slot0:0:0:0): XPT info: CLK 49500000, ...
sdda0: MMCHC DF4064 0.1 SN 1A61E8CB MFG 08/2001 by 69 0x0000
GEOM: new disk sdda0boot0
GEOM: new disk sdda0boot1
(sdda0:sdhci_slot0:0:0:0): Partition  0 -> 1
g_dev_taste: make_dev_alias_p() failed (name=mmcsd0, error=17)
(sdda0:sdhci_slot0:0:0:0): Partition  1 -> 2
(sdda0:sdhci_slot0:0:0:0): Partition  2 -> 0

This might be related to boot partitions but needs to be checked more.

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