Re: [PATCH] DMA-API: Clarify physical/bus address distinction

2014-05-01 Thread Bjorn Helgaas
On Thu, May 1, 2014 at 7:47 AM, Randy Dunlap wrote: > On 04/30/2014 12:42 PM, Bjorn Helgaas wrote: >> >> The DMA-API documentation sometimes refers to "physical addresses" when it >> really means "bus addresses." Historically these were often the same, but >> they may be different if the bridge

Re: [PATCH] DMA-API: Clarify physical/bus address distinction

2014-05-01 Thread Randy Dunlap
On 04/30/2014 12:42 PM, Bjorn Helgaas wrote: The DMA-API documentation sometimes refers to "physical addresses" when it really means "bus addresses." Historically these were often the same, but they may be different if the bridge leading to the bus performs address transaction. Update the

Re: [PATCH] DMA-API: Clarify physical/bus address distinction

2014-05-01 Thread Randy Dunlap
On 04/30/2014 12:42 PM, Bjorn Helgaas wrote: The DMA-API documentation sometimes refers to physical addresses when it really means bus addresses. Historically these were often the same, but they may be different if the bridge leading to the bus performs address transaction. Update the

Re: [PATCH] DMA-API: Clarify physical/bus address distinction

2014-05-01 Thread Bjorn Helgaas
On Thu, May 1, 2014 at 7:47 AM, Randy Dunlap rdun...@infradead.org wrote: On 04/30/2014 12:42 PM, Bjorn Helgaas wrote: The DMA-API documentation sometimes refers to physical addresses when it really means bus addresses. Historically these were often the same, but they may be different if the

[PATCH] DMA-API: Clarify physical/bus address distinction

2014-04-30 Thread Bjorn Helgaas
The DMA-API documentation sometimes refers to "physical addresses" when it really means "bus addresses." Historically these were often the same, but they may be different if the bridge leading to the bus performs address transaction. Update the documentation to use "bus address" when

[PATCH] DMA-API: Clarify physical/bus address distinction

2014-04-30 Thread Bjorn Helgaas
The DMA-API documentation sometimes refers to physical addresses when it really means bus addresses. Historically these were often the same, but they may be different if the bridge leading to the bus performs address transaction. Update the documentation to use bus address when appropriate.