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sdhci: Fix crash caused by M_WAITOK in sdhci dumps

Authored by on Sep 23 2021, 8:38 AM.
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In some contexts it is illegal to wait for memory allocation, causing
kernel panic. By default sbuf_new passes M_WAITOK to malloc,
which caused crashes when sdhci_dumpcaps or sdhci_dumpregs was callend in
non sutiable context.

Add SBUF_NOWAIT flag to sbuf_new to fix this.

Diff Detail

rG FreeBSD src repository
Lint Not Applicable
Tests Not Applicable

Event Timeline created this revision.
This revision was not accepted when it landed; it landed in state Needs Review.Oct 5 2021, 4:24 AM
This revision was automatically updated to reflect the committed changes.