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title: SDHI; implement support for HW busy timeout
team: IO
key: e2c455e0-1210-11ea-8389-b359bc6084c5
status: Active

upstream:

comments:
  - "currently we use a tasklet to detect busy timeouts"
  - "MMC maintainer says this is OKish, but HW timeout would be much better"
  - "this is all for supporting MMC_CAP_ERASE properly"
  - "MMC_CAP_ERASE has been removed meanwhile, and we set max_busy_timeout, too"
  - "we still should care about handling when data timeouts happen"
  - "RFT v1: https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=388391&state=*"
  - "RFT v2: https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=388435&state=*"
  - "needs some refactoring"
  - "refactored v1: https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=391145&state=*"
  - "refactored series with max_busy_timeout merged"
  - "prototype patches for handling data timeout developed by Shimoda-san and reviewed by Wolfram"
  - "WAIT_WHILE_BUSY needs to be enabled on top of 'data timeout' patches"