mvs: free DMA slots on channel attach failure#2252
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mvs_ch_attach() allocates per-slot DMA maps with mvs_slotsalloc() before several later attach steps can fail. The detach path frees those maps with mvs_slotsfree(), but attach failure does not reach mvs_ch_detach(), so the maps are leaked on the error path. Call mvs_slotsfree() before destroying the channel mutex in the common attach failure path. Signed-off-by: Haoxiang Li <lihaoxiang@isrc.iscas.ac.cn>
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mvs_ch_attach() allocates per-slot DMA maps with mvs_slotsalloc() before several later attach steps can fail. The detach path frees those maps with mvs_slotsfree(), but attach failure does not reach mvs_ch_detach(), so the maps are leaked on the error path.
Call mvs_slotsfree() before destroying the channel mutex in the common attach failure path.