Query regarding ADMA descriptor allocation

[Asutosh Das <asutoshd@codeaurora.org>]

Hi
In sdhci_add_host function, the number of adma descriptors allocated are 
128 and each descriptor consumes 8 bytes and 1 4byte is added in the end 
like,
kmalloc((128 * 2 + 1) * 4, GFP_KERNEL);

In sdhci_adma_table_pre function, each node in sg-list is iterated and 
in case of a misaligned node, a descriptor is consumed, which means for 
a single sg-node 2 descriptors were consumed. Let's say in a situation, 
where there are multiple unaligned addresses in multiple sg nodes and 
the sg-list length is 128, wouldn't this use up all the 128 descriptors 
long before the entire sg-list is traversed ?




-- 
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.