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nexedi
linux
Commits
b14c369d
Commit
b14c369d
authored
Jun 21, 2011
by
Stefan Richter
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firewire: ohci: add a comment on PHY reg access serialization
Signed-off-by:
Stefan Richter
<
stefanr@s5r6.in-berlin.de
>
parent
9ef28ccd
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drivers/firewire/ohci.c
drivers/firewire/ohci.c
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drivers/firewire/ohci.c
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b14c369d
...
...
@@ -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
;
...
...
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