From: Sergey Shtylyov s.shtylyov@omp.ru
stable inclusion from stable-v5.10.103 commit d3fce1b6bd95d6c90b92df41d72e3db6be63fbd5 bugzilla: https://gitee.com/openeuler/kernel/issues/I56NE7
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit 8d093e02e898b24c58788b0289e3202317a96d2a upstream.
The HPT371 chip physically has only one channel, the secondary one, however the primary channel registers do exist! Thus we have to manually disable the non-existing channel if the BIOS hasn't done this already. Similarly to the pata_hpt3x2n driver, always disable the primary channel.
Fixes: 669a5db411d8 ("[libata] Add a bunch of PATA drivers.") Cc: stable@vger.kernel.org Signed-off-by: Sergey Shtylyov s.shtylyov@omp.ru Signed-off-by: Damien Le Moal damien.lemoal@opensource.wdc.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Yu Liao liaoyu15@huawei.com Reviewed-by: Wei Li liwei391@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/ata/pata_hpt37x.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c index fad6c6a87313..499a947d56dd 100644 --- a/drivers/ata/pata_hpt37x.c +++ b/drivers/ata/pata_hpt37x.c @@ -917,6 +917,20 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id) irqmask &= ~0x10; pci_write_config_byte(dev, 0x5a, irqmask);
+ /* + * HPT371 chips physically have only one channel, the secondary one, + * but the primary channel registers do exist! Go figure... + * So, we manually disable the non-existing channel here + * (if the BIOS hasn't done this already). + */ + if (dev->device == PCI_DEVICE_ID_TTI_HPT371) { + u8 mcr1; + + pci_read_config_byte(dev, 0x50, &mcr1); + mcr1 &= ~0x04; + pci_write_config_byte(dev, 0x50, mcr1); + } + /* * default to pci clock. make sure MA15/16 are set to output * to prevent drives having problems with 40-pin cables. Needed