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Diffstat (limited to 'drivers/firewire/ohci.c')
| -rw-r--r-- | drivers/firewire/ohci.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c index 3b6f3429fb4a..a818dc834690 100644 --- a/drivers/firewire/ohci.c +++ b/drivers/firewire/ohci.c @@ -513,6 +513,12 @@ static inline void flush_writes(const struct fw_ohci *ohci) reg_read(ohci, OHCI1394_Version); } +/* + * Beware! read_phy_reg(), write_phy_reg(), update_phy_reg(), and + * read_paged_phy_reg() require the caller to hold ohci->phy_reg_mutex. + * In other words, only use ohci_read_phy_reg() and ohci_update_phy_reg() + * directly. Exceptions are intrinsically serialized contexts like pci_probe. + */ static int read_phy_reg(struct fw_ohci *ohci, int addr) { u32 val; |