https://github.com/torvalds/linux
Revision 6f195d6b0da3b689922ba9e302af2f49592fa9fc authored by Ben Wolsieffer on 27 September 2023, 17:57:49 UTC, committed by Jakub Kicinski on 04 October 2023, 20:22:37 UTC
The STM32MP1 keeps clk_rx enabled during suspend, and therefore the
driver does not enable the clock in stm32_dwmac_init() if the device was
suspended. The problem is that this same code runs on STM32 MCUs, which
do disable clk_rx during suspend, causing the clock to never be
re-enabled on resume.
This patch adds a variant flag to indicate that clk_rx remains enabled
during suspend, and uses this to decide whether to enable the clock in
stm32_dwmac_init() if the device was suspended.
This approach fixes this specific bug with limited opportunity for
unintended side-effects, but I have a follow up patch that will refactor
the clock configuration and hopefully make it less error prone.
Fixes: 6528e02cc9ff ("net: ethernet: stmmac: add adaptation for stm32mp157c.")
Signed-off-by: Ben Wolsieffer <ben.wolsieffer@hefring.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20230927175749.1419774-1-ben.wolsieffer@hefring.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
1 parent 0add5c5
Tip revision: 6f195d6b0da3b689922ba9e302af2f49592fa9fc authored by Ben Wolsieffer on 27 September 2023, 17:57:49 UTC
net: stmmac: dwmac-stm32: fix resume on STM32 MCU
net: stmmac: dwmac-stm32: fix resume on STM32 MCU
Tip revision: 6f195d6
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| .clang-format | -rw-r--r-- | 20.1 KB |
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 151 bytes |
| .gitattributes | -rw-r--r-- | 105 bytes |
| .gitignore | -rw-r--r-- | 2.0 KB |
| .mailmap | -rw-r--r-- | 35.6 KB |
| .rustfmt.toml | -rw-r--r-- | 369 bytes |
| COPYING | -rw-r--r-- | 496 bytes |
| CREDITS | -rw-r--r-- | 100.0 KB |
| Kbuild | -rw-r--r-- | 2.5 KB |
| Kconfig | -rw-r--r-- | 555 bytes |
| MAINTAINERS | -rw-r--r-- | 709.1 KB |
| Makefile | -rw-r--r-- | 65.9 KB |
| README | -rw-r--r-- | 727 bytes |
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