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| author | Jens Axboe <axboe@kernel.dk> | 2017-06-12 08:30:13 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-06-12 08:30:13 -0600 |
| commit | 8f66439eec46d652255b9351abebb540ee5b2fd9 (patch) | |
| tree | 94f4a41dc343cf769cd92f1f7711e9ce8ad43728 /drivers/ata/ahci.c | |
| parent | 22ec656bcc3f38207ad5476ebad1e5005fb0f1ff (diff) | |
| parent | 32c1431eea4881a6b17bd7c639315010aeefa452 (diff) | |
| download | linux-stable-8f66439eec46d652255b9351abebb540ee5b2fd9.tar.gz linux-stable-8f66439eec46d652255b9351abebb540ee5b2fd9.tar.bz2 linux-stable-8f66439eec46d652255b9351abebb540ee5b2fd9.zip | |
Merge tag 'v4.12-rc5' into for-4.13/block
We've already got a few conflicts and upcoming work depends on some of the
changes that have gone into mainline as regression fixes for this series.
Pull in 4.12-rc5 to resolve these conflicts and make it easier on down stream
trees to continue working on 4.13 changes.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/ata/ahci.c')
| -rw-r--r-- | drivers/ata/ahci.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 2fc52407306c..c69954023c2e 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -1364,6 +1364,40 @@ static inline void ahci_gtf_filter_workaround(struct ata_host *host) {} #endif +/* + * On the Acer Aspire Switch Alpha 12, sometimes all SATA ports are detected + * as DUMMY, or detected but eventually get a "link down" and never get up + * again. When this happens, CAP.NP may hold a value of 0x00 or 0x01, and the + * port_map may hold a value of 0x00. + * + * Overriding CAP.NP to 0x02 and the port_map to 0x7 will reveal all 3 ports + * and can significantly reduce the occurrence of the problem. + * + * https://bugzilla.kernel.org/show_bug.cgi?id=189471 + */ +static void acer_sa5_271_workaround(struct ahci_host_priv *hpriv, + struct pci_dev *pdev) +{ + static const struct dmi_system_id sysids[] = { + { + .ident = "Acer Switch Alpha 12", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "Switch SA5-271") + }, + }, + { } + }; + + if (dmi_check_system(sysids)) { + dev_info(&pdev->dev, "enabling Acer Switch Alpha 12 workaround\n"); + if ((hpriv->saved_cap & 0xC734FF00) == 0xC734FF00) { + hpriv->port_map = 0x7; + hpriv->cap = 0xC734FF02; + } + } +} + #ifdef CONFIG_ARM64 /* * Due to ERRATA#22536, ThunderX needs to handle HOST_IRQ_STAT differently. @@ -1636,6 +1670,10 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) "online status unreliable, applying workaround\n"); } + + /* Acer SA5-271 workaround modifies private_data */ + acer_sa5_271_workaround(hpriv, pdev); + /* CAP.NP sometimes indicate the index of the last enabled * port, at other times, that of the last possible port, so * determining the maximum port number requires looking at |